//
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// SGQRCodeScanView.m
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// SGQRCodeExample
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//
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// Created by kingsic on 2017/8/23.
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// Copyright © 2017年 kingsic All rights reserved.
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//
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#import "SGQRCodeScanView.h"
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/** 扫描内容的 W 值 */
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#define scanBorderW 0.7 * self.frame.size.width
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/** 扫描内容的 x 值 */
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#define scanBorderX 0.5 * (1 - 0.7) * self.frame.size.width
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/** 扫描内容的 Y 值 */
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#define scanBorderY 0.5 * (self.frame.size.height - scanBorderW)
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@interface SGQRCodeScanView ()
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@property (nonatomic, strong) UIView *contentView;
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@property (nonatomic, strong) NSTimer *timer;
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@property (nonatomic, strong) UIImageView *scanningline;
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@end
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@implementation SGQRCodeScanView
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- (instancetype)initWithFrame:(CGRect)frame {
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if (self = [super initWithFrame:frame]) {
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self.backgroundColor = [UIColor clearColor];
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[self initialization];
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}
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return self;
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}
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- (void)awakeFromNib {
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[super awakeFromNib];
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[self initialization];
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}
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- (void)initialization {
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_scanAnimationStyle = ScanAnimationStyleDefault;
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_borderColor = [UIColor whiteColor];
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_cornerLocation = CornerLoactionDefault;
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_cornerColor = [UIColor colorWithRed:85/255.0f green:183/255.0 blue:55/255.0 alpha:1.0];
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_cornerWidth = 2.0;
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_backgroundAlpha = 0.5;
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_animationTimeInterval = 0.02;
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_scanImageName = @"QRCodeScanLine";
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}
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- (UIView *)contentView {
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if (!_contentView) {
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_contentView = [[UIView alloc] init];
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_contentView.frame = CGRectMake(scanBorderX, scanBorderY, scanBorderW, scanBorderW);
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_contentView.clipsToBounds = YES;
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_contentView.backgroundColor = [UIColor clearColor];
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}
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return _contentView;
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}
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- (void)drawRect:(CGRect)rect {
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[super drawRect:rect];
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/// 边框 frame
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CGFloat borderW = scanBorderW;
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CGFloat borderH = borderW;
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CGFloat borderX = scanBorderX;
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CGFloat borderY = scanBorderY;
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CGFloat borderLineW = 0.2;
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/// 空白区域设置
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[[[UIColor blackColor] colorWithAlphaComponent:self.backgroundAlpha] setFill];
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UIRectFill(rect);
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// 获取上下文，并设置混合模式 -> kCGBlendModeDestinationOut
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CGContextRef context = UIGraphicsGetCurrentContext();
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CGContextSetBlendMode(context, kCGBlendModeDestinationOut);
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// 设置空白区
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UIBezierPath *bezierPath = [UIBezierPath bezierPathWithRect:CGRectMake(borderX + 0.5 * borderLineW, borderY + 0.5 *borderLineW, borderW - borderLineW, borderH - borderLineW)];
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[bezierPath fill];
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// 执行混合模式
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CGContextSetBlendMode(context, kCGBlendModeNormal);
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/// 边框设置
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UIBezierPath *borderPath = [UIBezierPath bezierPathWithRect:CGRectMake(borderX, borderY, borderW, borderH)];
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borderPath.lineCapStyle = kCGLineCapButt;
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borderPath.lineWidth = borderLineW;
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[self.borderColor set];
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[borderPath stroke];
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CGFloat cornerLenght = 20;
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/// 左上角小图标
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UIBezierPath *leftTopPath = [UIBezierPath bezierPath];
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leftTopPath.lineWidth = self.cornerWidth;
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[self.cornerColor set];
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CGFloat insideExcess = fabs(0.5 * (self.cornerWidth - borderLineW));
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CGFloat outsideExcess = 0.5 * (borderLineW + self.cornerWidth);
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if (self.cornerLocation == CornerLoactionInside) {
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[leftTopPath moveToPoint:CGPointMake(borderX + insideExcess, borderY + cornerLenght + insideExcess)];
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[leftTopPath addLineToPoint:CGPointMake(borderX + insideExcess, borderY + insideExcess)];
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[leftTopPath addLineToPoint:CGPointMake(borderX + cornerLenght + insideExcess, borderY + insideExcess)];
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} else if (self.cornerLocation == CornerLoactionOutside) {
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[leftTopPath moveToPoint:CGPointMake(borderX - outsideExcess, borderY + cornerLenght - outsideExcess)];
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[leftTopPath addLineToPoint:CGPointMake(borderX - outsideExcess, borderY - outsideExcess)];
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[leftTopPath addLineToPoint:CGPointMake(borderX + cornerLenght - outsideExcess, borderY - outsideExcess)];
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} else {
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[leftTopPath moveToPoint:CGPointMake(borderX, borderY + cornerLenght)];
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[leftTopPath addLineToPoint:CGPointMake(borderX, borderY)];
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[leftTopPath addLineToPoint:CGPointMake(borderX + cornerLenght, borderY)];
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}
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[leftTopPath stroke];
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/// 左下角小图标
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UIBezierPath *leftBottomPath = [UIBezierPath bezierPath];
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leftBottomPath.lineWidth = self.cornerWidth;
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[self.cornerColor set];
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if (self.cornerLocation == CornerLoactionInside) {
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[leftBottomPath moveToPoint:CGPointMake(borderX + cornerLenght + insideExcess, borderY + borderH - insideExcess)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX + insideExcess, borderY + borderH - insideExcess)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX + insideExcess, borderY + borderH - cornerLenght - insideExcess)];
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} else if (self.cornerLocation == CornerLoactionOutside) {
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[leftBottomPath moveToPoint:CGPointMake(borderX + cornerLenght - outsideExcess, borderY + borderH + outsideExcess)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX - outsideExcess, borderY + borderH + outsideExcess)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX - outsideExcess, borderY + borderH - cornerLenght + outsideExcess)];
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} else {
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[leftBottomPath moveToPoint:CGPointMake(borderX + cornerLenght, borderY + borderH)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX, borderY + borderH)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX, borderY + borderH - cornerLenght)];
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}
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[leftBottomPath stroke];
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/// 右上角小图标
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UIBezierPath *rightTopPath = [UIBezierPath bezierPath];
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rightTopPath.lineWidth = self.cornerWidth;
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[self.cornerColor set];
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if (self.cornerLocation == CornerLoactionInside) {
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[rightTopPath moveToPoint:CGPointMake(borderX + borderW - cornerLenght - insideExcess, borderY + insideExcess)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + insideExcess)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + cornerLenght + insideExcess)];
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} else if (self.cornerLocation == CornerLoactionOutside) {
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[rightTopPath moveToPoint:CGPointMake(borderX + borderW - cornerLenght + outsideExcess, borderY - outsideExcess)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY - outsideExcess)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY + cornerLenght - outsideExcess)];
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} else {
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[rightTopPath moveToPoint:CGPointMake(borderX + borderW - cornerLenght, borderY)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW, borderY)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW, borderY + cornerLenght)];
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}
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[rightTopPath stroke];
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/// 右下角小图标
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UIBezierPath *rightBottomPath = [UIBezierPath bezierPath];
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rightBottomPath.lineWidth = self.cornerWidth;
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[self.cornerColor set];
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if (self.cornerLocation == CornerLoactionInside) {
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[rightBottomPath moveToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + borderH - cornerLenght - insideExcess)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + borderH - insideExcess)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - cornerLenght - insideExcess, borderY + borderH - insideExcess)];
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} else if (self.cornerLocation == CornerLoactionOutside) {
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[rightBottomPath moveToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY + borderH - cornerLenght + outsideExcess)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY + borderH + outsideExcess)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - cornerLenght + outsideExcess, borderY + borderH + outsideExcess)];
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} else {
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[rightBottomPath moveToPoint:CGPointMake(borderX + borderW, borderY + borderH - cornerLenght)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW, borderY + borderH)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - cornerLenght, borderY + borderH)];
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}
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[rightBottomPath stroke];
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}
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#pragma mark - - - 添加定时器
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- (void)addTimer {
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CGFloat scanninglineX = 0;
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CGFloat scanninglineY = 0;
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CGFloat scanninglineW = 0;
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CGFloat scanninglineH = 0;
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if (self.scanAnimationStyle == ScanAnimationStyleGrid) {
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[self addSubview:self.contentView];
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[_contentView addSubview:self.scanningline];
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scanninglineW = scanBorderW;
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scanninglineH = scanBorderW;
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scanninglineX = 0;
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scanninglineY = - scanBorderW;
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_scanningline.frame = CGRectMake(scanninglineX, scanninglineY, scanninglineW, scanninglineH);
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} else {
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[self addSubview:self.scanningline];
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scanninglineW = scanBorderW;
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scanninglineH = 12;
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scanninglineX = scanBorderX;
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scanninglineY = scanBorderY;
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_scanningline.frame = CGRectMake(scanninglineX, scanninglineY, scanninglineW, scanninglineH);
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}
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self.timer = [NSTimer timerWithTimeInterval:self.animationTimeInterval target:self selector:@selector(beginRefreshUI) userInfo:nil repeats:YES];
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[[NSRunLoop mainRunLoop] addTimer:_timer forMode:NSRunLoopCommonModes];
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}
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#pragma mark - - - 移除定时器
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- (void)removeTimer {
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[self.timer invalidate];
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self.timer = nil;
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[_scanningline removeFromSuperview];
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_scanningline = nil;
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}
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#pragma mark - - - 执行定时器方法
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- (void)beginRefreshUI {
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__block CGRect frame = _scanningline.frame;
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static BOOL flag = YES;
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__weak typeof(self) weakSelf = self;
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if (self.scanAnimationStyle == ScanAnimationStyleGrid) {
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if (flag) {
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frame.origin.y = - scanBorderW;
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flag = NO;
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[UIView animateWithDuration:self.animationTimeInterval animations:^{
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frame.origin.y += 2;
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weakSelf.scanningline.frame = frame;
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} completion:nil];
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} else {
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if (_scanningline.frame.origin.y >= - scanBorderW) {
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CGFloat scanContent_MaxY = - scanBorderW + self.frame.size.width - 2 * scanBorderX;
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if (_scanningline.frame.origin.y >= scanContent_MaxY) {
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dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
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frame.origin.y = - scanBorderW;
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weakSelf.scanningline.frame = frame;
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flag = YES;
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});
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} else {
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[UIView animateWithDuration:self.animationTimeInterval animations:^{
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frame.origin.y += 2;
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weakSelf.scanningline.frame = frame;
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} completion:nil];
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}
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} else {
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flag = !flag;
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}
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}
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} else {
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if (flag) {
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frame.origin.y = scanBorderY;
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flag = NO;
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[UIView animateWithDuration:self.animationTimeInterval animations:^{
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frame.origin.y += 2;
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weakSelf.scanningline.frame = frame;
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} completion:nil];
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} else {
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if (_scanningline.frame.origin.y >= scanBorderY) {
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CGFloat scanContent_MaxY = scanBorderY + self.frame.size.width - 2 * scanBorderX;
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if (_scanningline.frame.origin.y >= scanContent_MaxY - 10) {
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frame.origin.y = scanBorderY;
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weakSelf.scanningline.frame = frame;
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flag = YES;
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} else {
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[UIView animateWithDuration:self.animationTimeInterval animations:^{
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frame.origin.y += 2;
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weakSelf.scanningline.frame = frame;
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} completion:nil];
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}
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} else {
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flag = !flag;
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}
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}
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}
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}
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- (UIImageView *)scanningline {
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if (!_scanningline) {
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_scanningline = [[UIImageView alloc] init];
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/// 静态库 url 的获取
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NSURL *url = [[NSBundle mainBundle] URLForResource:@"SGQRCode" withExtension:@"bundle"];
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if (!url) {
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/// 动态库 url 的获取
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url = [[NSBundle bundleForClass:[self class]] URLForResource:@"SGQRCode" withExtension:@"bundle"];
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}
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NSBundle *bundle = [NSBundle bundleWithURL:url];
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UIImage *image = [UIImage imageNamed:self.scanImageName inBundle:bundle compatibleWithTraitCollection:nil];
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if (!image) {
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image = [UIImage imageNamed:self.scanImageName];
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}
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_scanningline.image = image;
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}
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return _scanningline;
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}
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#pragma mark - - - set
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- (void)setScanAnimationStyle:(ScanAnimationStyle)scanAnimationStyle {
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_scanAnimationStyle = scanAnimationStyle;
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}
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- (void)setScanImageName:(NSString *)scanImageName {
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_scanImageName = scanImageName;
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}
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- (void)setBorderColor:(UIColor *)borderColor {
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_borderColor = borderColor;
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}
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- (void)setCornerLocation:(CornerLoaction)cornerLocation {
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_cornerLocation = cornerLocation;
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}
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- (void)setCornerColor:(UIColor *)cornerColor {
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_cornerColor = cornerColor;
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}
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- (void)setCornerWidth:(CGFloat)cornerWidth {
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_cornerWidth = cornerWidth;
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}
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- (void)setBackgroundAlpha:(CGFloat)backgroundAlpha {
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_backgroundAlpha = backgroundAlpha;
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}
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- (void)setAnimationTimeInterval:(NSTimeInterval)animationTimeInterval {
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_animationTimeInterval = animationTimeInterval;
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}
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@end
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